Potassium Carbonate → 5-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-4-[4-(7-fluoro-1-benzofuran-5-yl)phenyl]-2,4-dihydro-3H-1,2,4-triazol-3-one

HRID 2405383Notes

Reaction equation

HRID 2405383 reaction equation
[CH:1]1([C:4]([N:6]2[CH2:10][CH2:9][C@@H:8]([CH2:11][C:12]3[N:13]([C:18]4[CH:23]=[CH:22][C:21](B5OC(C)(C)C(C)(C)O5)=[CH:20][CH:19]=4)[C:14](=[O:17])[NH:15][N:16]=3)[CH2:7]2)=[O:5])[CH2:3][CH2:2]1.Br[C:34]1[CH:35]=[C:36]([F:43])[C:37]2[O:41][CH:40]=[CH:39][C:38]=2[CH:42]=1.C(=O)([O-])[O-].[K+].[K+]>O1CCOCC1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].ClCCl>[CH:1]1([C:4]([N:6]2[CH2:10][CH2:9][C@@H:8]([CH2:11][C:12]3[N:13]([C:18]4[CH:23]=[CH:22][C:21]([C:34]5[CH:35]=[C:36]([F:43])[C:37]6[O:41][CH:40]=[CH:39][C:38]=6[CH:42]=5)=[CH:20][CH:19]=4)[C:14](=[O:17])[NH:15][N:16]=3)[CH2:7]2)=[O:5])[CH2:3][CH2:2]1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 221448205-Bromo-7-fluorobenzofuranHCID 673756365-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-2,4-dihydro-3H-1,2,4-triazol-3-one

Product 1

HCID 673770755-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-4-[4-(7-fluoro-1-benzofuran-5-yl)phenyl]-2,4-dihydro-3H-1,2,4-triazol-3-oneYield 47%

Reagents, catalysts & solvents 2

HCID 178418807HCID 178418807, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A solution of 5-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-2,4-dihydro-3H-1,2,4-triazol-3-one (0.297 mmol) in dioxane (1.5 mL) was treated with 5-bromo-7-fluoro-1-benzofuran (0.297 mmol), dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium(II)-dichloromethane adduct (17 mg), and 2M aq potassium carbonate (0.89 mmol). The reaction mixture was purged with nitrogen, sealed, and stirred at 100° C. overnight. The reaction mixture was cooled to room temperature and was diluted with water (50 mL). The aqueous layer was acidified to pH˜4 using 1N aq HCl and was extracted with dichloromethane. The organic layer was dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude residue was purified by reverse phase HPLC (20-50% acetonitrile/water+0.1% NH4OH) to afford the title compound as a beige solid (47%). MS(ES)+ m/e 447.1 [M+H]+.

Workup

  1. customThe reaction mixture was purged with nitrogen
  2. customsealed
  3. temperatureThe reaction mixture was cooled to room temperature
  4. additionwas diluted with water (50 mL)
  5. extractionwas extracted with dichloromethane
  6. dry with materialThe organic layer was dried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe crude residue was purified by reverse phase HPLC (20-50% acetonitrile/water+0.1% NH4OH)

Sources & evidence

ORD record
ord-6831c0bca81543c0a92836175edf83ef
Source dataset
uspto-grants-2014_08
Patent number
US08802864B2

Reaction notes

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